WO2021139508A1 - Diffuseur, appareil d'alimentation en air et équipement de collecte de poussière - Google Patents

Diffuseur, appareil d'alimentation en air et équipement de collecte de poussière Download PDF

Info

Publication number
WO2021139508A1
WO2021139508A1 PCT/CN2020/137650 CN2020137650W WO2021139508A1 WO 2021139508 A1 WO2021139508 A1 WO 2021139508A1 CN 2020137650 W CN2020137650 W CN 2020137650W WO 2021139508 A1 WO2021139508 A1 WO 2021139508A1
Authority
WO
WIPO (PCT)
Prior art keywords
row
blades
stationary
stationary blades
blade
Prior art date
Application number
PCT/CN2020/137650
Other languages
English (en)
Chinese (zh)
Inventor
张伟
蒋婷婷
周亚运
杨帆
吕琢
Original Assignee
广东威灵电机制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202010010950.8A external-priority patent/CN113074138B/zh
Priority claimed from CN202010010952.7A external-priority patent/CN113074140B/zh
Priority claimed from CN202010011558.5A external-priority patent/CN113074142B/zh
Application filed by 广东威灵电机制造有限公司 filed Critical 广东威灵电机制造有限公司
Priority to KR1020227016870A priority Critical patent/KR20220079992A/ko
Priority to EP20911796.9A priority patent/EP4050222A4/fr
Priority to JP2022529913A priority patent/JP7407931B2/ja
Publication of WO2021139508A1 publication Critical patent/WO2021139508A1/fr
Priority to US17/829,872 priority patent/US20220290689A1/en
Priority to JP2023106405A priority patent/JP2023115280A/ja
Priority to JP2023106404A priority patent/JP2023115279A/ja

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/165—Axial entry and discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4253—Fan casings with axial entry and discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/12—Fluid guiding means, e.g. vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/12—Fluid guiding means, e.g. vanes
    • F05D2240/129—Cascades, i.e. assemblies of similar profiles acting in parallel

Definitions

  • This application belongs to the technical field of cleaning equipment, and in particular relates to a diffuser, an air supply device and a dust suction device.
  • the dust suction equipment is usually equipped with an air supply device, and a diffuser is installed in the air supply device to convert the kinetic energy of the airflow flowing through the air supply device into pressure energy, thereby reducing the flow loss of the airflow.
  • the diffuser is usually provided with static vanes to guide and pressurize the airflow.
  • the purpose of this embodiment is to provide a diffuser, which aims to solve the technical problem of large flow loss when the air flows through the diffuser in the prior art.
  • a diffuser including a base ring member and a plurality of rows of stationary blades, each row of the stationary blades is sequentially arranged on the outer ring wall of the base ring member along the axial direction of the base ring member , And are arranged along the circumferential direction of the base ring member, the opposite sides of the base ring member along the axial direction are respectively the air inlet side and the air outlet side, from the air inlet side to the air outlet side , Wherein the chord length of one row of the stationary blades is greater than or equal to the chord length of the next row of the stationary blades adjacent to the row of the stationary blades;
  • the stationary blades have an installation angle, from the inlet side to the outlet side, wherein the installation angle of one row of the stationary blades is less than or equal to the next row of the stationary blades adjacent to the row of stationary blades.
  • the installation angle of the blade is less than or equal to the next row of the stationary blades adjacent to the row of stationary blades.
  • the second aspect Provide a diffuser, including a base ring member and a plurality of stationary blades, the plurality of stationary blades are arranged in multiple rows along the axial direction of the base ring member, and each row of the stationary blades The number of stationary blades is multiple, and a plurality of stationary blades in each row of stationary blades are arranged along the circumference of the base ring member, and the cross section of the base ring member is circular; at least one row of the plurality of rows of the stationary blades The profile of each of the stationary blades is inclined to one side of the stationary blade.
  • the third aspect Provide a diffuser, including a base ring member and a plurality of stationary blades, the plurality of stationary blades are arranged in multiple rows along the axial direction of the base ring member, and each row of the stationary blades
  • the number of stationary blades is multiple, and a plurality of stationary blades in each row of stationary blades are arranged along the circumference of the base ring member, and the cross section of the base ring member is circular; at least one row of the plurality of rows of the stationary blades
  • the thickness of each of the stationary blades is set non-constantly from the head to the tail of the stationary blade.
  • the fourth aspect Provides an air supply device, including the above-mentioned diffuser.
  • a dust suction device including the above-mentioned air blowing device.
  • the diffuser provided in this embodiment has multiple rows of stationary blades arranged in the diffuser along the axial direction of the base ring, so that the airflow through the diffuser can be obtained
  • the multi-stage drainage effect of each row of stator blades realizes the multi-stage deceleration and pressurization of the airflow, thereby reducing the flow loss caused by the airflow when flowing through the diffuser.
  • the air supply device provided in this embodiment includes the above-mentioned diffuser, and the above-mentioned diffuser can ensure that the airflow can be smoothly realized without large flow loss when flowing through the diffuser. Decelerate and pressurize. In this way, the overall working efficiency of the air supply device is also improved, and the working energy consumption of the air supply device is saved.
  • the dust collection equipment provided by this embodiment includes the above-mentioned air supply device, and the above-mentioned air supply device can achieve smoother deceleration and pressure increase of the air flow, and is energy-saving and environmentally friendly during operation. This also significantly improves the inclusion of the above-mentioned air supply device. The dust collection effect of the dust collection equipment of the air supply device also saves the working energy consumption of the dust collection equipment.
  • Figure 1 is a schematic diagram of the structure of the air supply device provided by this embodiment
  • Figure 2 is a schematic diagram of the structure of the diffuser of the air supply device provided by this embodiment
  • Figure 3 is a cascade diagram of the first row of stationary blades of the diffuser of the air supply device provided by this embodiment
  • FIG. 4 is a cascade diagram of the first row of stationary blades and the second row of stationary blades of the diffuser of the air supply device provided by this embodiment;
  • Figure 5 is a schematic structural view of the base ring of the diffuser of the air supply device provided by this embodiment
  • Fig. 6 is a schematic diagram of a three-dimensional structure of a diffuser provided by an embodiment of the application.
  • Fig. 7 is a schematic plan view of the cascade of the diffuser of Fig. 6;
  • Fig. 8 is a schematic front view of the structure of the diffuser of Fig. 6;
  • Fig. 9 is a schematic top view of the base ring and the second row of stationary blades in the diffuser of Fig. 8;
  • Fig. 10 is a schematic bottom view of the base ring and the second row of stationary blades in the diffuser of Fig. 8;
  • Fig. 11 is a schematic cross-sectional structure view taken along line A-A in Fig. 8;
  • FIG. 12 is a schematic sectional view of the base ring member and a row of stator blades along the radial surface of the base ring member in the diffuser provided by the embodiment of the application;
  • FIG. 13 is a schematic diagram of a stationary blade on a meridian projection surface in a diffuser provided by an embodiment of the application;
  • FIG. 14 is a schematic sectional view of the diffuser along the axis passing through the base ring according to the embodiment of the application;
  • 15 is a schematic cross-sectional structure diagram of the first air supply device provided by an embodiment of the application.
  • FIG. 16 is a schematic cross-sectional structure diagram of a second type of air blowing device provided by an embodiment of the application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present application, “multiple” means two or more than two, unless otherwise specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components.
  • installed can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components.
  • this embodiment provides a diffuser 10 for an air blowing device 20, which can be, but is not limited to, used for dust collection equipment.
  • the diffuser 10 includes a base ring member 11 and a plurality of rows of stationary blades 114, and each row of stationary blades 114 is sequentially arranged on the outer ring wall 111 of the base ring member 11 along the axial direction of the base ring member 11.
  • the opposite sides of the base ring 11 along its axial direction are the air inlet side and the air outlet side
  • the base ring 11 has an outer ring wall 111 and an inner ring
  • a number of mounting holes 113 are opened in the wall 112 and the inner ring wall 112, and the base ring member 11 passes through the mounting hole 113 and the frame 221 through a locking bolt to achieve a fixed connection in the diffuser 10.
  • the chord length of one row of stationary blades 114 is greater than or equal to the chord length of the next row of stationary blades 114 adjacent to the row of stationary blades 114.
  • the stationary blades 114 have an installation angle, from the inlet side to the outlet side, the installation angle of one row of stationary blades 114 is smaller than or equal to the installation angle of the next row of stationary blades 114 adjacent to the row of stationary blades 114.
  • the connecting line of the corresponding points of the heads of multiple stator blades 114 in the same row is called the forehead line (shown by L1 in Fig. 3);
  • the back forehead line the connecting line of the corresponding points of the tails of the multiple stationary blades 114 in the same row is called the back forehead line (shown by L2 in Fig. 3);
  • Entrance placement angle the angle formed by the midline and the tangent line of the forehead line at the head of the blade (shown as ⁇ in Figure 3);
  • Exit placement angle the angle formed by the tangent line between the midline and the forehead line at the tail of the blade (shown as ⁇ in Figure 3);
  • Installation angle refers to the angle between the forehead line of the stator blade 114 and the chord length, which changes with the chord length (shown by ⁇ in Figure 3);
  • the head of the stationary blade 114 along the axial direction of the base ring 11, the foremost position of the stationary blade 114 is the head (shown in a in Fig. 3);
  • the tail of the stationary blade 114 along the axial direction of the base ring 11, the final position of the stationary blade 114 is the tail (shown in b in Figure 3);
  • the height of the stationary blade 114 the length of the stationary blade 114 in the radial direction of the base ring 11;
  • Tip The position where the stationary blade 114 increases to the top along its radial direction is the tip;
  • Chord length the straight line distance between the center line between the head of the stationary blade 114 and the tail of the stationary blade 114 is the chord length (shown by L4 in Fig. 3);
  • Centerline The curve formed by connecting each midpoint in the thickness direction of the stationary blade 114 from the head to the tail of the stationary blade 114 is called the centerline (shown by L3 in FIG. 3).
  • multiple rows of stator blades 114 are arranged in the diffuser along the axial direction of the base ring member, so that the airflow passing through the diffuser can obtain the multi-stage drainage of each row of stator blades 114 In this way, the multi-stage deceleration and pressurization of the air flow is realized, thereby reducing the flow loss caused by the air flow when it flows through the diffuser.
  • the diffuser 10 provided in this embodiment has multiple rows of stator blades 114 arranged in the diffuser 10 along the axial direction of the base ring 11, so that the flow
  • the airflow passing through the diffuser 10 can obtain the multi-stage drainage effect of each row of stator blades 114, so that the multi-stage deceleration and supercharging of the airflow is firstly realized.
  • the chord length of one row of stationary blades 114 is greater than or equal to the chord length of the next row of stationary blades 114 adjacent to the row of stationary blades 114 from the inlet side to the outlet side of the base ring 11.
  • each row of static blades 114 can gradually reduce the flow separation phenomenon caused by the airflow, and significantly reduce the flow loss caused by the airflow when flowing through the diffuser 10. In this way, the air flow can be smoothly decelerated and pressurized under the guiding action of each row of stator blades 114 without causing a large flow loss.
  • the head of the stationary blade 114 has an inlet placement angle from the inlet side to the outlet side.
  • the inlet placement angle of a row of stationary blades 114 is less than or equal to the next adjacent row of stationary blades 114.
  • the entrance of the discharging vane 114 is placed at an angle.
  • the outlet placement angle of one row of stationary blades 114 is less than or equal to the outlet placement angle of the next row of stationary blades 114 adjacent to the row of stationary blades 114.
  • the outlet placement angle of one row of stationary blades 114 is less than or equal to the outlet of the next row of stationary blades 114
  • the angle is placed, which further effectively suppresses the unevenness of the air flow when flowing from the upper row of stationary blades 114 to the next row of stationary blades 114, and also effectively suppresses the flow of air flow from the upper row of stationary blades 114 to the next row.
  • the flow separation phenomenon generated by the stator blades 114 effectively reduces the flow loss caused by the air flow from the upper row of the stator blades 114 to the next row of the stator blades 114, and improves the air flow efficiency.
  • the tail of the stationary blade 114 has an outlet placement angle, from the inlet side to the outlet side.
  • the outlet placement angle of one row of stationary blades 114 may be less than or equal to the next adjacent row of stationary blades 114.
  • the entrance of the discharging vane 114 is placed at an angle. This allows the airflow to flow smoothly from the upper row of stationary blades 114 to the next row of stationary blades 114.
  • the outlet placement angle of one row of stationary blades 114 may also be greater than the inlet placement angle of the next row of stationary blades 114 adjacent to the row.
  • the diffuser 10 includes a first row of stationary blades 12 and a second row of stationary blades 13, the first row of stationary blades 12 and the second row of stationary blades 13 from the inlet side to the outlet
  • the wind side is sequentially arranged on the outer ring wall 111 of the base ring 11 along the axial direction of the base ring 11.
  • the number of rows of the stator blades 114 can be two rows, which on the one hand ensures that there are a sufficient number of the stator blades 114 to fully divert and diffuse the airflow, and on the other hand, it also ensures that the number of rows of the stator blades 114 will not Too much, thereby achieving a compact design of the diffuser 10.
  • the angle value of the inlet placement angle of the first row of stationary blades 12 is 5°-20°
  • the angle value of the inlet placement angle of the second row of stationary blades 13 is 20°-40°.
  • the angle value of the inlet placement angle of the first row of stationary blades 12 may be 5°, 5.5°, 6°, 6.5°, 7°, 7.5°, 8°, 8.5°, 9°, 9.5°, 10° , 10.5°, 11°, 11.5°, 12°, 12.5°, 13°, 13.5°, 14°, 14.5°, 15°, 15.5°, 16°, 16.5°, 17°, 17.5°, 18°, 18.5 °, 19°, 19.5 or 20°.
  • the angle value of the inlet placement angle of the second row of stationary blades 13 can be 20°, 20.5°, 21°, 21.5°, 22°, 22.5°, 23°, 23.5°, 24°, 24.5°, 25°, 25.5° , 26°, 26.5°, 27°, 27.5°, 28°, 28.5°, 29°, 29.5°, 30°, 30.5°, 31°, 31.5°, 32°, 32.5°, 33°, 33.5°, 34 °, 34.5, 35°, 35.5°, 36°, 36.5°, 37°, 37.5°, 38°, 38.5°, 39°, 39.5° or 40°.
  • the angle value of the outlet placement angle of the first row of stationary blades 12 is 10°-60°, and the angle value of the inlet placement angle of the second row of stationary blades 13 is 60°-80°.
  • the angle value of the outlet placement angle of the first row of stationary blades 12 may be 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55° or 60° .
  • the angle value of the inlet placement angle of the second row of stationary blades 13 can be 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68°, 69°, 70°, 71° , 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79° or 80°.
  • the ratio of the chord length of the first row of stationary blades 12 to the chord length of the second row of stationary blades 13 is greater than or equal to 1 and less than or equal to 5.
  • the ratio of the chord length of the first row of stationary blades 12 to the chord length of the second row of stationary blades 13 can be 1, 1.2, 1.5, 1.7, 2, 2.2, 2.5, 2.7, 3, 3, 3.2, 3.5, 3.7, 4, 4.2, 4.5, 4.7 or 5.
  • the number of blades of the first row of stationary blades 12 is less than or equal to the number of blades of the second row of stationary blades 13, and the first row of stationary blades 12 and the second row of stationary blades 13 respectively extend uniformly in the circumferential direction of the outer ring wall
  • the first row of stationary blades 12 and the second row of stationary blades 13 are mutually offset in the axial direction of the outer ring wall, and at least the head or tail of one stationary blade 114 in the first row of stationary blades 12 and the second row of stationary blades
  • the head or tail of one of the stationary blades 114 in 13 is aligned with the axial direction of the outer ring wall. In this way, the cohesion between the first row of stationary blades 12 and the second row of stationary blades 13 is stronger, thereby facilitating the efficient flow of airflow from the first row of stationary blades 12 to the second row of stationary blades 13.
  • the number of blades of the first row of stationary blades 12 is 6 to 20, and the number of blades of the second row of stationary blades 13 is 10 to 30.
  • the number of blades of the first row of stator blades 12 can be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 blades
  • the number of blades of the second row of stator blades 13 can be 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 pieces, 21 pieces, 22 pieces, 23 pieces, 24 pieces, 25 pieces, 26 pieces, 27 pieces, 28 pieces, 29 pieces or 30 pieces.
  • the first row of stationary blades 12 and the second row of stationary blades 13 do not correspond one-to-one, and it is not a strict N-to-one relationship. Instead, the number of the second row of stationary blades 13 is determined first. Position a certain end of the stationary blade 114 in the second row of stationary blades 13 and a certain end of the stationary blade 114 in the first row of stationary blades 12, and then evenly distribute the second row of stationary blades 13 on the base ring member 11 On the outer ring wall, after the layout of the second row of stationary blades 13 is completed, the layout of the first row of stationary blades 12 is performed.
  • the distance between the head of the first row of stationary blades 12 and the tail of the second row of stationary blades 13 in the axial direction of the base ring member 11 (shown in D in FIG. 4) Less than or equal to 3mm.
  • this ensures that the first row of stationary blades 12
  • the smooth connection with the second row of stationary blades 13 to the airflow ensures the flow efficiency of the airflow.
  • the distance between the heads of the first row of stationary blades 12 and the tails of the second row of stationary blades 13 along the axial direction of the base ring member 11 is greater than or equal to 1 mm and less than or equal to 3 mm.
  • the air flow is ensured.
  • the best balance between flow efficiency and avoiding interference between the first row of stationary blades 12 and the second row of stationary blades 13 is achieved, so that the first row of stationary blades 12 and the second row of stationary blades 13 can avoid mutual interference.
  • the airflow passing through the first row of stationary blades 12 and the second row of stationary blades 13 achieves optimal drainage and diffusion effects.
  • the outlet placement angle includes a first outlet placement angle at the root of the stationary blade 114 and a second outlet placement angle at the tip of the stationary blade 114.
  • the angle value of the first outlet placement angle and the first outlet placement angle The difference between the angle values of the two outlet installation angles is 0° ⁇ 20°.
  • the contour line of the stator blade 114 along the radial direction of the base ring 11 is a curve, indicating the static
  • the blade 114 is bent in the radial direction of the base ring member 11.
  • the difference between the angle value of the first outlet angle and the angle value of the second outlet angle may be 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8. °, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19° or 20°.
  • the stationary blade 114 is an arc-shaped blade. Specifically, by setting the stator blade 114 as an arc-shaped blade, the stator blade 114 has a smoother and smoother drainage curve, thereby ensuring that the airflow can flow through the stator blade 114 more smoothly and stably.
  • each stator blade 114 of the diffuser 10 abuts against the inner side wall of the windshield 21. Specifically, by making the top surface of each stator blade 114 abut against the inner side wall of the wind hood 21, each stator blade 114 can fully occupy the area enclosed by the base ring 11 and the wind hood 21, thereby realizing the alignment.
  • the airflow entering the air blowing device 20 achieves a sufficient drainage effect, and thereby achieves sufficient diffusion and deceleration of the airflow.
  • the inlet placement angle of the first row of stationary blades 12 is 15°
  • the outlet placement angle is 24°
  • the second row of stationary blades 13 The entrance angle is 35°
  • the exit angle is 75°
  • the axial distance between the tail of the first row of stationary blades 12 and the head of the corresponding second row of stationary blades 13 is 1.8mm.
  • the inlet placement angle of the first row of stationary blades 12 is 20°
  • the outlet placement angle is 27°
  • the inlet placement angle of the second row of stationary blades 13 is 42°
  • the outlet placement angle is 60°
  • the axial distance between the tail of the first row of stationary blades 12 and the head of the corresponding second row of stationary blades 13 is 1.3mm.
  • This embodiment also provides an air blowing device 20, which includes the above-mentioned diffuser 10.
  • the air blowing device 20 includes a wind hood 21, a driving mechanism 22, a moving impeller 23, and a diffuser 10.
  • the driving mechanism 22 is arranged in the wind hood 21, and the moving impeller 23 and the driving mechanism 22 are connected and correspond to the wind hood 21.
  • the air inlet 24 is provided, and the diffuser 10 is fixed in the wind hood 21 and is located on the side of the moving impeller 23 away from the air inlet 24.
  • the driving mechanism 22 includes a frame 221, a motor 222, and a circuit board 223.
  • the frame 221 and the circuit board 223 are both fixed in the windshield 21, the motor 222 is arranged on the frame 221, and the drive shaft 224 of the motor 222 passes through
  • the passing frame 221 and the diffuser 10 are connected with the moving impeller 23 to drive the moving impeller 23 to rotate.
  • the air supply device provided in this embodiment includes the above-mentioned diffuser, and the above-mentioned diffuser can ensure that the airflow can be smoothly realized without large flow loss when flowing through the diffuser. Decelerate and pressurize. In this way, the overall working efficiency of the air supply device is also improved, and the working energy consumption of the air supply device is saved.
  • This embodiment also provides a dust suction device, which includes the above-mentioned air blowing device.
  • the dust collection equipment provided by this embodiment includes the above-mentioned air supply device, and the above-mentioned air supply device can achieve smoother deceleration and pressure increase of the air flow, and is energy-saving and environmentally friendly during operation. This also significantly improves the inclusion of the above-mentioned air supply device.
  • the dust collection effect of the dust collection equipment of the air supply device also saves the working energy consumption of the dust collection equipment.
  • the diffuser 10 includes a base ring 11 and a plurality of stationary blades 114, the plurality of stationary blades 114 are arranged in multiple rows, and the multiple rows of static blades
  • the blades 114 are arranged along the axial direction of the base ring 11, the number of stationary blades 114 in each row of stationary blades 114 is multiple, and the multiple stationary blades 114 in each row of stationary blades 114 are arranged along the circumferential direction of the base ring 11;
  • a flow channel 15 for guiding the flow of air flow may be formed between the two stationary blades 114.
  • the cross section of the base ring member 11 is circular, so that when the air flow is deflected toward the base ring member 11 to rotate radially and flow along the axis of the base ring member 11, the flow to the peripheral side of the base ring member 11 is close to each other, so that it is subject to resistance. It is similar, so that the airflow flows more smoothly to the peripheral side of the base ring 11, and energy loss is reduced.
  • the multiple stator blades 114 are arranged in multiple rows along the axial direction of the base ring 11, and the multiple rows of stator blades 114 can gradually guide the air flow, reduce energy loss, and improve the pressure diffusion effect.
  • the definition is as follows: when air flows through the diffuser 10, the direction of the air inlet is upward, forward, or head, and the direction of the air outlet is downward, rear, or tail.
  • a plurality of stationary blades 114 are divided into two rows along the axial direction of the base ring 11, from top to bottom, there are the first row of stationary blades 12 and the second row of stationary blades 13, that is, the first row of stationary blades 12 It is the upper row of the second row of stationary blades 13, and the second row of stationary blades 13 is the next row of the first row of stationary blades 12.
  • the plurality of stationary blades 114 are divided into three rows along the axial direction of the base ring 11, from top to bottom, there are a first row of stationary blades 12, a second row of stationary blades 13, and a third row of stationary blades 114.
  • the plurality of stationary blades 114 are divided into four or more rows along the axial direction of the base ring member 11, and from top to bottom are the first row of stationary blades 12, the second row of stationary blades 13, and the third row of stationary blades 114... . That is, when a plurality of stator blades 114 are arranged in N (N is a positive integer, N ⁇ 2) rows along the axis of the base ring 11, they are divided into the first row, the second row...the Nth row from top to bottom; ,
  • the M-1 row of stationary blades 114 is the upper row of stationary blades 114 of the M-th row of stationary blades 114, and the M-th row of stationary blades 114 is the next row of stationary blades 114 of the M-1 row of stationary blades 114, (M is Positive integer, M ⁇ N).
  • the profile 18 of the stationary blade 114 refers to the two side surfaces between the root 17 and the tip 16 of the stationary blade 114; the two side surfaces between the root 17 and the tip 16 of the stationary blade 114 are respectively The suction surface 19 and the pressure surface 14 are collectively referred to as the profile 18; and the blade root 17 of the stationary blade 114 refers to the position of the stationary blade 114 close to the root of the base ring member 11; the blade of the stationary blade 114
  • the tip 16 refers to the position of the stator blade 114 that is far away from the top of the base ring member 11; the head of the stator blade 114 refers to the position at the front end of the stator blade 114 along the air flow direction, that is, the position on the stator blade 114 that starts to contact the air flow; the stator blade 114
  • the tail of refers to the part located at the rear end of the stationary blade 114 along the flow direction of the airflow, that is, the part on the corresponding stationary blade 114 when the airflow leaves
  • each stationary blade 114 in the first row of stationary blades 12: the two side surfaces of each stationary blade 114 are suction surface 19a and pressure surface 14a respectively, and the suction surface 19a and pressure surface 14a are collectively referred to as the profile 18a of the stationary blade 114; A flow channel 15a for guiding the airflow can be formed between two adjacent stator blades 114.
  • the two sides of each stationary blade 114 are suction surface 19b and pressure surface 14b, respectively.
  • the suction surface 19b and pressure surface 14b are collectively referred to as the profile 18b of the stationary blade 114; two adjacent stationary blades
  • a flow channel 15b for guiding the air flow may be formed between 114.
  • a plurality of stator blades 114 are divided into two rows along the axial direction of the base ring member 11. From top to bottom, there are the first row of stator blades 12 and the second row of stator blades 13, namely, the first row of stator blades 12 and the second row of stator blades 13.
  • One row of stationary blades 12 is the upper row of the second row of stationary blades 13, and the second row of stationary blades 13 is the next row of the first row of stationary blades 12.
  • the plurality of stator blades 114 are divided into three, four or more rows along the axial direction of the base ring 11.
  • a curved surface of equal unit thickness with the same shape as the base ring 11 is cut at the middle of the height direction of the stator blade 114.
  • the curved surface is cylindrical, and the curved surface is coaxial with the base ring 11.
  • the curved surface is expanded in a plane, and a plane cascade diagram of each stationary blade 114 is obtained.
  • the connecting line at the corresponding point of the head of each stationary blade 114 in each row of stationary blades 114 is called the forehead line L1 of the row of stationary blades 114
  • the forehead line L1 is the forehead line L1 of each stationary blade 114 in the row of stationary blades 114.
  • the tangent line of the corresponding point of the head; the connecting line of the corresponding point of the tail of each stationary blade 114 in each row of stationary blades 114 is called the rear forehead line L2 of the row of stationary blades 114, and the rear forehead line L2 is the row of stationary blades 114.
  • the tangent line of the corresponding point at the tail of the blade 114; the curve formed by the midpoints of the thickness H of each stator blade 114 is called the center line L3 of the stator blade 114; the tangent line of the center line L3 at the head of the corresponding stator blade 114 corresponds to the head of the stator blade 114
  • the angle between the point tangent line is the entrance placement angle ⁇ , that is, the angle between the tangent line of the midline L3 at the head of the stator blade 114 and the corresponding forehead line L1 is the inlet placement angle ⁇ ;
  • the angle between the tangent to the corresponding point of the tail is the exit placement angle ⁇ , that is, the angle between the tangent of the midline L3 at the tail of the stationary blade 114 and the corresponding rear forehead line L2 is the outlet placement angle ⁇ ;
  • the midline L3 is between the head and the tail of the stationary blade 114
  • the distance between the two points is the chord length L4, and the
  • the connecting line of the corresponding point of the head of each stationary blade 114 in the first row of stationary blades 12 is the forehead line L1a of the first row of stationary blades 12, and the forehead line L1a is the first row of stationary blades.
  • the tangent line of the corresponding point of the head of each stationary blade 114 in the blade 12; the connecting line of the corresponding point of the tail of each stationary blade 114 in the first row of stationary blades 12 is the rear forehead line L2a of the first row of stationary blades 12, and the rear forehead line L2a Is the tangent line of the corresponding point of the tail of each stationary blade 114 in the first row of stationary blades 12;
  • the curve formed by the midpoint of the thickness Ha of each stationary blade 114 in the first row of stationary blades 12 is called the center line L3a of the stationary blade 114;
  • the angle between the center line L3a of each stationary blade 114 in the row of stationary blades 12 at the tangent to the head of the stationary blade 114 and the tangent to the corresponding point of the head of the stationary blade 114 is the entrance placement angle ⁇ a; each stationary blade in the first row of stationary blades 12
  • the connecting line of the corresponding points of the heads of the stationary blades 114 in the second row of stationary blades 13 is the forehead line L1b of the second row of stationary blades 13, and the forehead line L1b is the second row of stationary blades.
  • the tangent line of the corresponding point of the head of each stationary blade 114 in the blade 13; the connecting line of the corresponding point of the tail of each stationary blade 114 in the second row of stationary blades 13 is the rear forehead line L2b of the second row of stationary blades 13, and the rear forehead line L2b Is the tangent line of the corresponding point of the tail of each stationary blade 114 in the second row of stationary blades 13; the curve formed by the midpoints of the thickness Hb of each stationary blade 114 in the second row of stationary blades 13 is called the center line L3b of the stationary blade 114;
  • the angle between the center line L3b of each stationary blade 114 in the row of stationary blades 13 at the tangent line of the head of the stationary blade 114 and the tangent line of the corresponding point of the head of the stationary blade 114 is the entrance setting angle ⁇ b; each stationary blade in the second row of stationary blades 13 The angle between the centerline L3b of 114 at the tail of the stationary blade 114 and the
  • the thickness H of each stationary blade 114 in at least one row of stationary blades 114 is set non-constantly from the head to the tail of the stationary blade 114 Therefore, when the airflow enters the flow passage 15 between two adjacent stator blades 114 in the row of static blades 114, the flow separation is improved, and the flow separation loss is reduced; and the flow passage between the stator blades 114 in the row of stator blades 114 is flowed by the airflow.
  • the vortex flow can be improved, and the flow separation at the blade root 17 can be regulated; and when the air flow flows out of the flow channel 15 between the stator blades 114 in the row of the stator blades 114, the unevenness of the air flow can be reduced, the diffusion effect can be improved, and the aerodynamic noise can be reduced.
  • a plurality of rows of stationary blades 114 are arranged in the circumferential direction of the base ring 11, and the plurality of rows of stationary blades 114 gradually guide the airflow to reduce the absolute speed of the airflow to improve the supercharging effect; and at least one The thickness H of each stationary blade 114 in the stationary blade 114 is set non-constantly from the head to the tail of the stationary blade 114.
  • each stator blade 114 is inclined to the axial direction of the base ring member 11, and the length direction of each stator blade 114 refers to the direction in which the head and the tail of the stator blade 114 are connected.
  • the flow path 15 between the blades 114 can gradually guide the airflow to change direction and reduce the energy loss of the airflow.
  • the thickness H of each stationary blade 114 in one of the rows of stationary blades 114 can be set non-constantly from the head to the tail of the stationary blade 114.
  • the thickness H of each stationary blade 114 in the rows of stationary blades 114 may be set non-constantly from the head to the tail of the stationary blade 114. It is also possible to set the thickness H of each stationary blade 114 in each row of stationary blades 114 non-constantly from the head to the tail of the stationary blade 114.
  • each stationary blade 114 with a non-constant thickness H the thickness H of each stationary blade 114 first gradually increases from the head to the tail of the stationary blade 114 and then gradually decreases, so that the airflow passes through the stationary blades.
  • the flow passage 15 between the blades 114 first gradually reduce the circumferential velocity and absolute velocity of the air flow to reduce the flow separation loss; then improve the vortex, reduce the unevenness of the flow passage 15 between the air flow out of the stator blades 114, reduce the flow separation loss, and improve Diffuser effect reduces aerodynamic noise.
  • the chord length L5 at the position where the thickness H of each stator blade 114 is the largest is 30 of the chord length L of the stator blade 114 % ⁇ 45%, that is, in the thickness H corresponding to each point on the centerline of each stator blade 114, the chord length L5 of the position corresponding to the point on the centerline where the thickness H is the largest is 30% ⁇ 45% of the chord length L of the stator blade 114;
  • each position on the center line of each stationary blade 114 in the row of stationary blades 114 corresponds to the thickness Ha
  • the position chord length L5a of the point corresponding to the maximum Ha is 30%-45% of the chord length La of the stator blade 114.
  • each position on the center line of each stationary blade 114 in the row of stationary blades 114 corresponds to the thickness Hb.
  • the chord length L5b of the position corresponding to the point where Hb is the largest is 30%-45% of the chord length Lb of the stator blade 114.
  • the chord length L5 at the position where the thickness H of each stator blade 114 is the largest is 35 of the chord length L of the stator blade 114 % ⁇ 40%, that is, in the thickness H corresponding to each point on the centerline of each stator blade 114, the chord length L5 of the position corresponding to the point on the centerline where the thickness H is the largest is 35%-40% of the chord length L of the stator blade 114; Reduce the flow separation loss, improve the eddy current, improve the pressure diffusion effect, and reduce the aerodynamic noise.
  • the thickness Hb of each stationary blade 114 satisfies the following relationship, that is, in the second row of stationary blades 13: each point on the center line of each stationary blade 114 corresponds to The thickness Hb satisfies the following relationship:
  • the thickness of the head of each stator blade 114 is in the range of 0.1-0.8mm;
  • chord length L5b at the position of each stator blade 114 is the thickness Hb at 40% of the chord length Lb of the stator blade 114 in the range of 1.1-1.4mm;
  • the thickness of the tail of each stationary blade 114 ranges from 0.1 to 1 mm.
  • the thickness Hb of each stationary blade 114 satisfies the following relationship, that is, in the second row of stationary blades 13: each point on the center line of each stationary blade 114 corresponds to The thickness Hb satisfies the following relationship:
  • the thickness of the head of each stator blade 114 is in the range of 0.1-0.8mm;
  • chord length L5b at the position of each stator blade 114 is 30% of the chord length Lb of the stator blade 114.
  • the thickness Hb ranges from 1 to 1.3 mm;
  • chord length L5b at the position of each stator blade 114 is the thickness Hb at 40% of the chord length Lb of the stator blade 114 in the range of 1.1-1.4mm;
  • chord length L5b at the position of each stator blade 114 is 50% of the chord length Lb of the stator blade 114.
  • the thickness Hb ranges from 1 to 1.3 mm;
  • chord length L5b at the position of each stator blade 114 is 60% of the chord length Lb of the stator blade 114.
  • the thickness Hb ranges from 0.9-1.2mm;
  • chord length L5b at the position of each stator blade 114 is 70% of the chord length Lb of the stator blade 114.
  • the thickness Hb is in the range of 0.8-1.1mm;
  • the thickness of the tail of each stationary blade 114 ranges from 0.1 to 1 mm.
  • T1 0.82+0.68L1b-0.17L1b 2 +0.011L1b 3 ;
  • T2 0.68L1b-0.17L1b 2 +0.011L1b 3 ;
  • L1b is the distance from the corresponding point on the centerline of the stationary blade 114 to the head of the stationary blade 114, that is, L1b is the position chord length of the corresponding point on the centerline of the stationary blade 114, L1b 2 is the square of L1b, and L1b 3 is the length of L1b.
  • T1 is the relational formula of the maximum thickness at the corresponding point on the centerline of the stator 114
  • T2 is the relational expression of the minimum thickness at the corresponding point on the center line of the stationary blade 114.
  • L1b is the static The distance from the corresponding point on the centerline of the blade 114 to the head of the stationary blade 114, that is, L1b is the chord length of the position of the corresponding point on the centerline of the stationary blade 114, L1b 2 is the square of L1b, L1b 3 is the third power of L1b, and 0.68L1b is 0.68 times L1b, 0.17L1b 2 is 0.17 times L1b 2 , and 0.011L1b 3 is 0.011 times L1b 3 .
  • the flow loss can be better reduced, the unevenness of the air flow is improved, the vortex flow is improved, the diffusion effect is
  • the outer diameter of the base ring 11 ranges from 35 to 80 mm. In this way, the thickness H of the stator blade 114 is better matched with the base ring 11, the size of the flow channel 15 between the adjacent stator blades 114 is ensured, the resistance to the air flow is reduced, the energy loss is reduced, and the pressure diffusion effect is improved.
  • any position on the center line of each stationary blade 114 corresponds to the thickness of the root 17 as H1, and the thickness at the tip 16 at this position is H2, H1 ⁇ H2, that is, the thickness H1 of the root 17 at any position on the center line of each stationary blade 114 is greater than or equal to the thickness H2 at the tip 16 of the position, to better control the flow separation near the blade root 17, reduce flow separation loss, and improve Diffuser effect.
  • the blade root 17 is thicker than the blade tip 16 or It is equal to 0.5mm, which is convenient for processing and manufacture, and ensures the strength of the tip 16 of each stator blade 114, and at the same time regulates the flow separation near the blade root 17, reduces the flow separation loss and improves the pressure diffusion effect.
  • each stationary blade 114 with a non-constant thickness H the thickness H at various locations on the center line of each stationary blade 114 gradually changes from the root 17 to the tip 16 of the stationary blade 114 Increase the setting to better control the flow separation near the blade root 17, reduce the flow separation loss, and improve the diffusion effect.
  • the airflow flows from the outlet of the moving impeller in a radial direction and flows in a high-speed circumferential direction, and turns into the diffuser 10 axially at a very short distance of the windshield, so the flow separation at the outlet of the moving impeller is serious.
  • each stator blade 114 is gradually increased from the head to the tail of the stator blade 114 to gradually reduce the circumferential velocity and absolute velocity of the airflow, and improve the deceleration and boost effect.
  • the vortex flow of the flow channel 15 can be further reduced, the energy loss is reduced, and the boosting effect is improved.
  • the installation angle ⁇ of the chord length L5 at different positions of the stator blade 114 is changed as follows: the installation angle ⁇ of the front half of the stator blade 114 is basically equal to the inlet installation angle ⁇ , so that the flow passage 15 between the first half of the stator blade 114 The area is evenly increased to achieve a uniform reduction in the absolute velocity of the airflow and the effect of boosting.
  • the installation angle ⁇ of the second half of the stator blade 114 is increased from the inlet placement angle ⁇ to the outlet placement angle ⁇ to reduce the circumferential velocity and absolute velocity of the airflow, and further improve the deceleration and boost effect.
  • the inlet setting angle ⁇ a of each stationary blade 114 ranges from 5 degrees to 10 degrees.
  • the setting angle ⁇ a of the inlet of each stator blade 114 is in the range of 5°-10°, which can better match the airflow with high circumferential velocity at the inlet of the stator blade 114, so as to uniformly reduce the absolute speed of the airflow and improve the supercharging effect.
  • the inlet setting angle ⁇ b of each stationary blade 114 ranges from 20 degrees to 60 degrees.
  • the setting angle ⁇ b of the inlet of each stator blade 114 is in the range of 20°-60°, which can better match the airflow with high circumferential velocity at the inlet of the stator blade 114, so as to uniformly reduce the absolute speed of the airflow and improve the supercharging effect.
  • the inlet setting angle ⁇ a of each stationary blade 114 ranges from 5 degrees to 10 degrees.
  • the inlet setting angle ⁇ b of each stationary blade 114 ranges from 20 degrees to 60 degrees.
  • the angle ⁇ a of the outlet of each stationary blade 114 ranges from 10 degrees to 20 degrees. As the airflow flows out from the tail of the stationary blade 114, the airflow angle distribution is more uneven. Setting the outlet angle ⁇ a in the range of 10 degrees to 20 degrees can further suppress the unevenness of the outlet flow at the tail of the stator blade 114, so as to reduce energy loss and improve the deceleration and boost effect.
  • the inlet setting angle ⁇ a of each stationary blade 114 ranges from 10 degrees to 20 degrees.
  • the inlet setting angle ⁇ b of each stationary blade 114 ranges from 20 degrees to 60 degrees.
  • the angle ⁇ b at the outlet of each stationary blade 114 ranges from 50° to 90°. As the airflow flows out from the tail of the stationary blade 114, the angular distribution of the airflow is more uneven. Setting the outlet angle ⁇ b in the range of 50 degrees to 90 degrees can further suppress the unevenness of the outlet flow at the tail of the stator blade 114, so as to reduce energy loss and improve the deceleration and boost effect.
  • the inlet setting angle ⁇ a of each stationary blade 114 ranges from 10 degrees to 20 degrees.
  • the inlet setting angle ⁇ b of each stationary blade 114 ranges from 50 degrees to 90 degrees.
  • the airflow can pass through the first row of stationary blades 12 to the second row of stationary blades 13, and the circumferential velocity and absolute velocity can be gradually reduced, reducing the unevenness of the airflow at the tail of the first row of stationary blades 12, and improving the supercharging effect.
  • the outlet setting angle ⁇ b of each stator blade 114 ranges from 60 degrees to 90 degrees
  • the inlet setting angle ka of each stator blade 114 ranges from 25 degrees to 50 degrees.
  • the inlet setting angle ⁇ of each stationary blade 114 varies less than or equal to 10 degrees along the radial direction of the base ring member 11, that is, the inlet setting angle ⁇ of each stationary blade 114 changes from the blade root 17 to the blade tip 16.
  • the amplitude is less than or equal to 10 degrees
  • the inlet placement angle ⁇ at the root 17 of each stationary blade 114 is greater than or equal to the inlet placement angle ⁇ at the tip 16 of the stationary blade 114, which can facilitate processing and manufacture on the one hand, and reduce it on the other hand.
  • the flow separation loss improves the pressure diffusion effect.
  • the number of stationary blades 114 in the next row of stationary blades 114 is 1.5 ⁇ the number of stationary blades 114 in the previous row of stationary blades 114 3 times.
  • the number of stator blades 114 in the previous row of stator blades 114 is relatively small, and the number of stator blades 114 in the next row of stator blades 114 is set to be larger, so that when the airflow passes through each row of stator blades 114 in turn, the airflow can be gradually strengthened. , Decelerate the air flow and improve the boosting effect.
  • the tail of each stationary blade 114 in the upper row of stationary blades 114 deviates from the adjacent next row along the circumferential direction of the base ring member 11
  • the head angle of the corresponding stationary blade 114 is less than or equal to 20 degrees.
  • the plane passing through the axis of the root 17 and the base ring 11 of each stator blade 114 in the upper row of stator blades 114, and passing through the root 17 and the base ring 11 of the head of the corresponding stator blade 114 in the next row The plane of the axis, the angle between the two planes is less than or equal to 20 degrees, so as to reduce the unevenness of the air flow, reduce the flow separation loss, and improve the boosting effect.
  • the inclination angle Q of the profile 18 at a certain point on the stator blade 114 refers to the radial direction of the base ring member 11 passing through the point on the stator blade 114 The angle between the line segment where the profile 18 of the stator blade 114 intersects the radial surface and the radial line passing through the point on the stator blade 114.
  • the radial surface of the base ring member 11 refers to a plane perpendicular to the axial direction of the base ring member 11, the radial line is the radial line of the base ring member 11, and the radial line of the base ring member 11 refers to the plane along the base ring member 11 11 A straight line extending in the radial direction, and a radial line passing through the point on the stator blade 114 refers to a straight line extending in the radial direction of the base ring member 11 and passing through the point.
  • the inclination angle of the head profile 18 of each stator blade 114 is greater than or equal to the inclination angle of the head profile 18 of the stator blade 114.
  • the inclination angle of the tail profile 18 of each stator blade 114 is set to be greater than or equal to the inclination angle of the head profile 18, so that when the air flows through the flow passage 15 between the stator blades 114, the stator blades 114 gradually strengthen the guidance and adjustment of the air flow to Improve the flow channel 15 vortex, reduce the separation loss, and then reduce the energy loss of the air flow and reduce the noise.
  • the inclination angle of the profile 18 of each stator blade 114 gradually increases from the head to the tail of the stator blade 114, so that when the air flows through
  • the airflow can be gradually adjusted to improve the airflow separation loss, reduce the energy loss, and reduce the noise.
  • the inclination angle of the head profile 18b of each stationary blade 114 is Q1
  • the inclination angle of the tail profile 18b of each stationary blade 114 is Q2 , Q2 ⁇ Q1.
  • the inclination angle Q1 of the tail profile 18b of each stator blade 114 in the second row of stator blades 13 is set to be greater than or equal to the inclination angle Q1 of the head profile 18b.
  • the stator blade 114 When the airflow can flow through the flow passage 15b between the stator blades 114, the stator blade 114 gradually Strengthen the guidance and adjustment of the airflow to improve the vortex of the flow channel 15b, reduce the separation loss, and then reduce the energy loss of the airflow and reduce the noise.
  • the value of Q1 ranges from 0 degrees to 30 degrees, that is, the inclination angle Q1 of the head profile 18b of each stationary blade 114 is less than or
  • the airflow is equal to 30 degrees, when the airflow enters the flow channel 15b between the stator blades 114, it can prevent the airflow angle from being adjusted too large, which may cause a large energy loss.
  • the value of Q2 ranges from 0 degrees to 40 degrees, that is, the inclination angle Q2 of the head profile 18b of each stator blade 114 is less than or equal to 40 degrees, which can avoid adjusting the air flow when the air flows through the flow passage 15b between the stator blades 114 Too large, and cause greater energy loss.
  • the value of Q1 ranges from 12 degrees to 18 degrees, so that when the airflow enters the flow channel 15b between the stator blades 114, it can be better To reduce flow separation loss and reduce noise.
  • the value range of Q2 is 20 degrees to 35 degrees, and Q2 ⁇ Q1.
  • the value of Q1 ranges from 0° to 30°, so as to prevent the airflow angle from being adjusted too large when the airflow enters the flow passage 15b between the stationary blades 114
  • the value of Q2 ranges from 15 degrees to 40 degrees to avoid excessive adjustment of the air flow when the air flows through the flow passage 15b between the stator blades 114, which may cause a large energy loss.
  • the wrap angle of each stationary blade 114 in the previous row of stationary blades 114 is greater than or equal to the wrap angle of each stationary blade 114 in the next row of stationary blades 114 angle. Setting the wrap angle of each stator blade 114 in the previous row of stator blades 114 to be larger can better guide the air flow gradually, reduce the separation loss, and improve the pressure diffusion effect.
  • the chord length La of each stationary blade 114 in the previous row of stationary blades 114 is greater than or equal to that of each stationary blade 114 in the next row of stationary blades 114 Chord length Lb; since the airflow has a relatively large circumferential velocity when entering the diffuser 10, when the airflow passes through each row of stationary blades 114, the chord length Lb of each stationary blade 114 in the previous row of stationary blades 114 is set If it is longer, it can better guide the airflow, reduce the circumferential velocity of the airflow, and be gradually guided by each row of static blades 114 to reduce separation loss.
  • the plane passing through the axial direction of the base ring 11 is the meridian surface of the diffuser 10, and the stationary blades 114 projected onto the meridian surface along the circumferential direction of the base ring 11 are the meridian surfaces.
  • the leading edge line 214 of each stationary blade 114 is a line segment where the head of the stationary blade 114 is projected onto the meridian surface.
  • the trailing edge line 215 of each stationary blade 114 is a line segment where the tail of the stationary blade 114 is projected onto the meridian surface.
  • the intersection line of the radial plane of the base ring 11 and the meridian projection plane is a line segment perpendicular to the axial direction of the base ring 11.
  • the leading edge line 214 of each stationary blade 114 is arranged obliquely to the radial surface of the base ring member 11. That is, the line segment of the leading edge line 214 of each stator blade 114 in the row of stator blades 114 on the meridian projection surface is inclined to the radial direction of the base ring 11; thus, the flow separation loss can be reduced and the diffusion effect can be improved.
  • the leading edge line 214 of each stationary blade 114 in one of the rows of stationary blades 114 may be inclined to the radial surface of the base ring 11.
  • the absolute value of the inclination angle B1 between the leading edge line 214 of each stationary blade 114 and the radial surface of the base ring member 11 is less than or equal to 25 degree.
  • the absolute value of the inclination angle B1 between the leading edge line 214 of each stator blade 114 in the second row of stator blades 13 and the radial surface of the base ring member 11 is less than or equal to 25 degrees to better reduce the flow separation loss and improve the expansion ⁇ Pressure effect.
  • the leading edge line 214 of each stationary blade 114 is inclined toward the tail of the stationary blade 114 to further control the flow separation near the blade root 17. Reduce the flow separation loss and improve the pressure diffusion effect.
  • the trailing edge line 215 of each stationary blade 114 is arranged obliquely to the radial surface of the base ring member 11. That is, the line segment of the trailing edge line 215 of each stationary blade 114 in the row of stationary blades 114 on the meridian projection surface is inclined to the radial direction of the base ring member 11; thus, the unevenness of the air flow at the outlet of the stationary blade 114 can be reduced, and the pressure diffusion can be improved. effect.
  • the trailing edge line 215 of each stationary blade 114 in one of the rows of stationary blades 114 can be arranged obliquely to the radial surface of the base ring 11.
  • the trailing edge line 215 of each of the stator blades 114 in the rows of stator blades 114 obliquely to the radial surface of the base ring 11.
  • the trailing edge line 215 of each stationary blade 114 in each row of stationary blades 114 obliquely to the radial surface of the base ring member 11.
  • the absolute value of the inclination angle B2 between the trailing edge line 215 of each stationary blade 114 and the radial surface of the base ring member 11 is less than or equal to 30 degrees.
  • the absolute value of the inclination angle B2 between the trailing edge line 215 of each stator blade 114 in the second row of stator blades 13 and the radial surface of the base ring member 11 is less than or equal to 30 degrees, so as to better improve the air flow at the exit of the stator blade 114 Uniformity, improve the effect of expansion.
  • the diffuser 10 further includes a casing (not shown), the base ring 11 is placed in the casing, and each stator blade 114 is located between the base ring 11 and the casing.
  • Setting the casing can not only protect the stator blades 114, but also can form a channel between the base ring 11 and the casing to better limit the air flow channel and ensure that the diffuser 10 can be delivered in different ways. Consistency of performance in wind installations.
  • each stationary blade 114 is in contact with the inner surface of the casing, that is, at least 80% of the tip 16 of each stationary blade 114 is in contact with the inner surface of the casing.
  • the casing, the base ring 11 and the stator blades 114 are integrally formed to ensure a good connection between the casing and the stator blades 114 and increase the strength of the diffuser 10 at the same time.
  • the casing can be made separately, and then the base ring 11 with the stator blades 114 is placed in the casing.
  • the diffuser 10 of this embodiment can not only improve the vortex flow of the flow channel 15 well, reduce the separation loss, reduce the energy loss, and improve the supercharging effect, but also can reduce the aerodynamic noise; the diffuser 10 of this embodiment can be used for air supply
  • the device can not only generate greater suction, but also has less operating noise.
  • the diffuser 10 of this embodiment can be applied not only to air supply devices, but also to electrical appliances such as dust collection equipment, range hoods, and air blowing devices.
  • this embodiment also provides an air blowing device 20, which includes a frame 221, an impeller 31, a wind cover 32, a motor 222, and the diffuser 10 as described in any of the above embodiments.
  • the diffuser 10 is installed in the frame 221, the impeller 31 is arranged at the front end of the diffuser 10, the air hood 32 is covered on the impeller 31, and the air hood 32 is installed on the frame 221, and the motor 222 is installed on the frame 221 Among them, the motor 222 is connected to the impeller 31.
  • the air blowing device 20 can reduce energy loss and operating noise by using the diffuser 10 of the above-mentioned embodiment, so that a greater suction force can be generated under the same power.
  • a bearing 225 is installed in the base ring 11, and the drive shaft 224 of the motor 222 passes through the bearing 225 and is connected to the impeller 31, so that the motor 222 drives the impeller 31 to rotate more flexibly.
  • the impeller 31 is a closed centrifugal impeller 31a.
  • the impeller 31 may also be an open centrifugal impeller.
  • the impeller 31 may also be a mixed flow impeller 31b.
  • the wind hood 32 can extend to the tail of the diffuser 10, that is, the wind hood 32 covers both the impeller 31 and the diffuser 10, so as to better reduce the airflow at the outlet of the impeller 31. Lead to diffuser 10.
  • the frame 221 may be integrally formed with the wind cover 32 to ensure the connection strength between the frame 221 and the wind cover 32.
  • the air blowing device 20 of this embodiment can be applied to electrical appliances such as dust collection equipment, range hoods, air blowing devices, fans, and the like.
  • This embodiment also discloses a dust suction device in this embodiment, which includes the air blowing device 20 as described in any of the above embodiments.
  • the dust collection equipment of this embodiment uses the above-mentioned air blowing device 20, which not only has high power, high efficiency, and low noise.
  • This embodiment is different from Embodiment 2 in that: referring to Figures 6, 9 and 10, in the multiple rows of stationary blades 114: the profile 18 of each stationary blade 114 in at least one row of stationary blades 114 faces the One side of the stationary blade 114 is inclined.
  • the profile 18 of the corresponding stationary blade 114 is inclined toward one side of the stationary blade 114, that is, the height direction of the profile 18 of the stationary blade 114 is inclined to the radial arrangement of the base ring member 11, which can effectively improve the airflow when leaving the stationary blade 114.
  • the boundary layer is separated to reduce separation loss and improve the vortex of the flow passage 15 between the stator blades 114, thereby reducing flow loss, reducing air flow energy loss, and reducing aerodynamic noise.
  • the profile 18a of each stationary blade 114 in the first row of stationary blades 12 can be arranged obliquely, so that when the airflow passes through the first row of stationary blades 12, the absolute speed of the airflow is reduced, while the separation loss is reduced, and the Boosting effect.
  • each stationary blade 114 in the second row of stationary blades 13 can be inclined so as to reduce the absolute velocity of the air flow when the air flows through the second row of stationary blades 13. , Reduce separation loss and improve booster effect.
  • the profile 18 of each of the stationary blades 114 in the first row of stationary blades 12 and each of the stationary blades 114 in the second row of stationary blades 13 can be arranged obliquely, so as to better reduce the airflow velocity and reduce the separation. Loss, reduce the unevenness of the air flow, and improve the supercharging effect.
  • the profile 18 of each stationary blade 114 in one of the rows of stationary blades 114 may be inclined.
  • the profile 18 of each of the rows of stationary blades 114 can also be inclined. It is also possible to arrange the profile 18 of each stationary blade 114 in each row of stationary blades 114 obliquely.
  • the profile 18 of the stator blade 114 is obliquely arranged toward one side of the suction surface 19 of the stator blade 114. It can better improve the separation of the airflow boundary layer, improve the vortex of the flow passage 15 between the stator blades 114, reduce energy loss, and reduce aerodynamic noise.
  • the profile 18 of the stator blade 114 is obliquely installed toward the side of the pressure surface 14 of the stator blade 114. It can better improve the unevenness of the air flow, improve the vortex of the flow passage 15 between the stator blades 114, reduce energy loss, and reduce aerodynamic noise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un diffuseur (10) comprenant un élément annulaire de base (11) et de multiples rangées d'aubes fixes (114). Chaque rangée d'aubes fixes (114) est disposée sur une paroi annulaire externe (111) de l'élément annulaire de base (11) dans la direction axiale de l'élément annulaire de base (11), et est disposée de manière circonférentielle le long de l'élément annulaire de base (11) ; deux côtés opposés de l'élément annulaire de base (11) constituent un côté d'entrée d'air et un côté de sortie d'air, et du côté d'entrée d'air au côté de sortie d'air, la longueur de corde d'une rangée d'aubes fixes (114) est supérieure ou égale à la longueur de corde de la rangée suivante d'aubes fixes (114) adjacente à la rangée d'aubes fixes (114) ; chaque aube fixe (114) présente un angle de montage, et du côté d'entrée d'air au côté de sortie d'air, l'angle de montage d'une rangée d'aubes fixes (114) est inférieur ou égal à l'angle de montage de la rangée suivante d'aubes fixes (114) adjacente à la rangée d'aubes fixes (114). En disposant de multiples rangées d'aubes fixes (114) sur le diffuseur (10), un flux d'air s'écoulant à travers le diffuseur (10) peut être soumis à un effet de guidage d'écoulement à étages multiples de chaque rangée d'aubes fixes (114), de manière à obtenir une réduction de vitesse et une mise sous pression à étages multiples du flux d'air, ce qui permet de réduire la perte d'écoulement du flux d'air lorsqu'il s'écoule à travers le diffuseur.
PCT/CN2020/137650 2020-01-06 2020-12-18 Diffuseur, appareil d'alimentation en air et équipement de collecte de poussière WO2021139508A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1020227016870A KR20220079992A (ko) 2020-01-06 2020-12-18 디퓨저, 송풍 장치 및 집진 장비
EP20911796.9A EP4050222A4 (fr) 2020-01-06 2020-12-18 Diffuseur, appareil d'alimentation en air et équipement de collecte de poussière
JP2022529913A JP7407931B2 (ja) 2020-01-06 2020-12-18 ディフューザ、送風装置及び集塵設備
US17/829,872 US20220290689A1 (en) 2020-01-06 2022-06-01 Diffuser, air supply device, and vacuum cleaning equipment
JP2023106405A JP2023115280A (ja) 2020-01-06 2023-06-28 ディフューザ、送風装置及び集塵設備
JP2023106404A JP2023115279A (ja) 2020-01-06 2023-06-28 ディフューザ、送風装置及び集塵設備

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN202010010950.8A CN113074138B (zh) 2020-01-06 2020-01-06 扩压装置、风机及吸尘器
CN202010011558.5 2020-01-06
CN202010010950.8 2020-01-06
CN202010010952.7A CN113074140B (zh) 2020-01-06 2020-01-06 扩压器、送风装置及吸尘器
CN202010010952.7 2020-01-06
CN202010011558.5A CN113074142B (zh) 2020-01-06 2020-01-06 扩压装置、风机及吸尘器

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/829,872 Continuation US20220290689A1 (en) 2020-01-06 2022-06-01 Diffuser, air supply device, and vacuum cleaning equipment

Publications (1)

Publication Number Publication Date
WO2021139508A1 true WO2021139508A1 (fr) 2021-07-15

Family

ID=76787447

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/137650 WO2021139508A1 (fr) 2020-01-06 2020-12-18 Diffuseur, appareil d'alimentation en air et équipement de collecte de poussière

Country Status (5)

Country Link
US (1) US20220290689A1 (fr)
EP (1) EP4050222A4 (fr)
JP (3) JP7407931B2 (fr)
KR (1) KR20220079992A (fr)
WO (1) WO2021139508A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114183402A (zh) * 2020-09-14 2022-03-15 北京石头世纪科技股份有限公司 风机及清洁设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861826A (en) * 1972-08-14 1975-01-21 Caterpillar Tractor Co Cascade diffuser having thin, straight vanes
US4946348A (en) * 1989-02-14 1990-08-07 Airflow Research & Manufacturing Corporation Centrifugal fan with airfoil vanes in annular volute envelope
JPH06307392A (ja) * 1993-04-28 1994-11-01 Hitachi Ltd 遠心圧縮機及び羽根付ディフューザ
RU2402695C1 (ru) * 2009-06-19 2010-10-27 Закрытое Акционерное Общество "Новомет-Пермь" Направляющий аппарат центробежного многоступенчатого насоса
CN110513304A (zh) * 2018-05-22 2019-11-29 美的集团股份有限公司 离心风机和吸尘器
CN211666920U (zh) * 2020-01-06 2020-10-13 广东威灵电机制造有限公司 送风装置及吸尘器
CN212079745U (zh) * 2020-05-13 2020-12-04 广东威灵电机制造有限公司 扩压装置、风机及吸尘器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2798661A (en) * 1954-03-05 1957-07-09 Westinghouse Electric Corp Gas turbine power plant apparatus
US3173604A (en) * 1962-02-15 1965-03-16 Gen Dynamics Corp Mixed flow turbo machine
US5152661A (en) * 1988-05-27 1992-10-06 Sheets Herman E Method and apparatus for producing fluid pressure and controlling boundary layer
US4981414A (en) * 1988-05-27 1991-01-01 Sheets Herman E Method and apparatus for producing fluid pressure and controlling boundary layer
JP2018105268A (ja) * 2016-12-28 2018-07-05 日本電産株式会社 送風装置及びそれを備えた掃除機
US10641282B2 (en) * 2016-12-28 2020-05-05 Nidec Corporation Fan device and vacuum cleaner including the same
JP2018193940A (ja) * 2017-05-18 2018-12-06 日本電産株式会社 送風装置、および掃除機
GB2573813A (en) * 2018-05-18 2019-11-20 Dyson Technology Ltd A Compressor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861826A (en) * 1972-08-14 1975-01-21 Caterpillar Tractor Co Cascade diffuser having thin, straight vanes
US4946348A (en) * 1989-02-14 1990-08-07 Airflow Research & Manufacturing Corporation Centrifugal fan with airfoil vanes in annular volute envelope
JPH06307392A (ja) * 1993-04-28 1994-11-01 Hitachi Ltd 遠心圧縮機及び羽根付ディフューザ
RU2402695C1 (ru) * 2009-06-19 2010-10-27 Закрытое Акционерное Общество "Новомет-Пермь" Направляющий аппарат центробежного многоступенчатого насоса
CN110513304A (zh) * 2018-05-22 2019-11-29 美的集团股份有限公司 离心风机和吸尘器
CN211666920U (zh) * 2020-01-06 2020-10-13 广东威灵电机制造有限公司 送风装置及吸尘器
CN212079745U (zh) * 2020-05-13 2020-12-04 广东威灵电机制造有限公司 扩压装置、风机及吸尘器

Also Published As

Publication number Publication date
JP7407931B2 (ja) 2024-01-04
US20220290689A1 (en) 2022-09-15
JP2023503929A (ja) 2023-02-01
EP4050222A4 (fr) 2022-12-21
JP2023115280A (ja) 2023-08-18
KR20220079992A (ko) 2022-06-14
EP4050222A1 (fr) 2022-08-31
JP2023115279A (ja) 2023-08-18

Similar Documents

Publication Publication Date Title
KR102582026B1 (ko) 송풍장치 및 이를 포함하는 공기조화기의 실외기
US11506211B2 (en) Counter-rotating fan
WO2014030248A1 (fr) Compresseur centrifuge
CN211398054U (zh) 扩压装置、风机及吸尘器
CN109611356B (zh) 一种后向离心风机
CN205559366U (zh) 一种离心压缩机的扩压器
US11116367B2 (en) Electric fan and vacuum cleaner having same
WO2023124700A1 (fr) Dispositif à pale combinée et dispositif de sortie d'air combiné
WO2021139508A1 (fr) Diffuseur, appareil d'alimentation en air et équipement de collecte de poussière
JP2009062953A (ja) 多翼羽根車および多翼送風機
WO2021169197A1 (fr) Ventilateur centrifuge et dispositif de climatisation
CN113074138B (zh) 扩压装置、风机及吸尘器
CN209925295U (zh) 鱼鳍形仿生降噪离心风机
TWI414681B (zh) 軸流式風扇之扇輪
CN109779970A (zh) 鱼鳍形仿生降噪离心风机
CN113074139B (zh) 扩压装置、风机及吸尘器
WO2021135696A1 (fr) Unité extérieure pour un conditionneur d'air
CN113074142B (zh) 扩压装置、风机及吸尘器
CN217999965U (zh) 一种导流圈结构、轴流风机、室外机和空调系统
WO2021143044A1 (fr) Ventilateur centrifuge et dispositif d'alimentation en air
CN220505410U (zh) 一种风机及应用有该风机的清洁装置
CN109595198A (zh) 一种风机叶轮
CN114941636B (zh) 一种前置增压多翼离心叶轮及离心风机
CN113074127B (zh) 送风装置及吸尘器
CN113074143B (zh) 扩压器、送风装置及吸尘器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20911796

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20227016870

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2022529913

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2020911796

Country of ref document: EP

Effective date: 20220525

NENP Non-entry into the national phase

Ref country code: DE